- 责任者：Feng Han (Laboratory of Earth Surface Process and Environment ; School of Geographic and Oceanographic Sciences ; Nanjing University ; Nanjing 210093 ; China) ; Lu Huayu
- 刊名：Quaternary Sciences
- 出版年：2013
- 卷期：33(2)
- 关键词：沙漠 ; deserts ; 全新世 ; Holocene ; 内蒙古 ; Inner Mongolia ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.252-259
- 图表：illus., 1 table, 64 refs.
- 分类号：1400
- issnNo：ISSN1001-7410
- isbnNo：CN11-2708/P
There are typical deserts and sand fields in north-Central China where the climate is dominated by East Asian monsoon circulation, this area is dry with precipitation peak occurs at summer time that significantly regulate the desert/sand field environment changes. One distinguish feature is that the desert border changes have probably been directly forced by climate change at the glacial-interglacial timescale, however, the specific border changes are not well reconstructed; we do not know the spatial distribution of these deserts/sand field during the typical climate such as the Last Glacial Maximum（LGM） and the Holocene Optimum （HO）. In this study, the borders of Tengger desert,Badain Jaran desert and Gonghe sand field in Northern-Central China during the LGM and the HO are tentatively reconstructed, based on newly obtained deposit record and synthesized previous literatures data. In that the buried aeolian sand, sandy loam and loess in the deposit sequences located at around the current borders are clear directors of the deserts/sand field expansion and contraction during the past time. Our preliminary reconstruction show that th＇e Tengger desert was expanded 25 -40kin to south and southeast,36km to the west and 13km to the east respectively during the LGM, the desert area was 28.8% larger than that of the present. At the same time,the area of Badain Jaran desert was expanded southward and eastward, covering the entire northwestern part with the current shallow lake and fluvial deposit ,with an area 39.0% larger than that of the present desert; for the Gonghe sand field,the area of mobilized dunes was 19.8% larger than that of the present area. However, the boundary at southern Tengger desert might retreat to north 20km during the HO, and the mobile dunes in Gonehe basin were nearly completely stabilized at the HO. The further reconnaissance and precisely dated sediment sequences will improve the precision of the border reconstruction for these deserts.